github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/test/syscalls/linux/base_poll_test.cc (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #include "test/syscalls/linux/base_poll_test.h"
    16  
    17  #include <sys/syscall.h>
    18  #include <sys/types.h>
    19  #include <syscall.h>
    20  #include <unistd.h>
    21  
    22  #include "gtest/gtest.h"
    23  #include "absl/memory/memory.h"
    24  #include "absl/time/clock.h"
    25  #include "absl/time/time.h"
    26  #include "test/util/test_util.h"
    27  
    28  namespace gvisor {
    29  namespace testing {
    30  
    31  static volatile int timer_fired = 0;
    32  static void SigAlarmHandler(int, siginfo_t*, void*) { timer_fired = 1; }
    33  
    34  BasePollTest::BasePollTest() {
    35    // Register our SIGALRM handler, but save the original so we can restore in
    36    // the destructor.
    37    struct sigaction sa = {};
    38    sa.sa_sigaction = SigAlarmHandler;
    39    sigfillset(&sa.sa_mask);
    40    TEST_PCHECK(sigaction(SIGALRM, &sa, &original_alarm_sa_) == 0);
    41  }
    42  
    43  BasePollTest::~BasePollTest() {
    44    ClearTimer();
    45    TEST_PCHECK(sigaction(SIGALRM, &original_alarm_sa_, nullptr) == 0);
    46  }
    47  
    48  void BasePollTest::SetTimer(absl::Duration duration) {
    49    pid_t tgid = getpid();
    50    pid_t tid = gettid();
    51    ClearTimer();
    52  
    53    // Create a new timer thread.
    54    timer_ = absl::make_unique<TimerThread>(absl::Now() + duration, tgid, tid);
    55  }
    56  
    57  bool BasePollTest::TimerFired() const { return timer_fired; }
    58  
    59  void BasePollTest::ClearTimer() {
    60    timer_.reset();
    61    timer_fired = 0;
    62  }
    63  
    64  }  // namespace testing
    65  }  // namespace gvisor